Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
About this service
This is the physical process of building a secondary unit, which requires coordinating contractors, electricians, and plumbers. You need professional construction services when you are ready to break ground on your design. Costs are driven by the complexity of the foundation, interior finish levels, and site grading requirements. Exact pricing confirmed free on the call.
Frequently asked in Beaverton
Can I find an Accessory Dwelling Unit near me in Beaverton?
What are the options for prefab ADUs in Beaverton?
What is the Accessory Dwelling Unit construction cost in Beaverton?
What is ADU housing in Beaverton?
Where can I find an ADU builder in Beaverton?
What does Accessory Dwelling Unit mean in Beaverton?
Are affordable ADU options available in Beaverton?
Also serving nearby: Hillsboro · Portland · Vancouver · Gresham · Salem
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Beaverton — population 96,945; about 4,935 residents per square mile across 19.6 sq mi. ZIP codes covered include 97003, 97005, 97006, 97007, 97008, 97075, 97076, 97077.
Neighborhoods served in Beaverton: Raleigh Hills, Aloha, Tigard, Hillsboro, Garden Home-Whitcomb — and every surrounding area.
Areas we serve
Browse by state, then city.
